What do you think is the biggest problem in the Christian community?

I think one of the biggest ones is that every day a new denomination in Christianity pops up claiming to be the "true" religion and starts denouncing all others as false or going on the wrong path to righteousness. I mean, it's okay if you have your beliefs (or if you don't have beliefs in some cases), but why go to such extremes as to bash another's just to promote your belief or lack of belief? I don't think that's very Christian-like or even morally right. And this is coming from an atheist. :-) What say you, fellow christians and non-christians?